Comparative study of mass attenuation coefficients for LDPE/metal oxide composites by Monte Carlo simulations
Faculty of Physics and Nuclear Engineering, Shahrood University of Technology, P.O. Box 3619995161, Shahrood, Iran
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Accepted: 8 November 2019
Published online: 17 January 2020
On the basis of photon–matter interactions landscape, γ-rays shielding effectiveness of light density polyethylene (LDPE) composites reinforced with different percentages of micro- and nano-PbO, WO3, ZnO, and TiO2 particles was studied. Using voxelization in MCNPX code, metal oxide particles with sizes of 100 nm, 1 µm, and 100 µm and proportions of 10, 25, and 50 wt% were designed inside a LDPE matrix. Narrow beam geometry was simulated to calculate the mass attenuation coefficient of structures against photons in a wide energy region of 0.015–15 MeV. Although the significant role of filler size and proportion in attenuating X- and γ-rays was confirmed, the results indicated that application of PbO and WO3 particles in reinforcing polymeric matrix provides greater photon attenuation compared to those doped with ZnO and TiO2 particles. Besides, it was found that attenuation performance of the LDPE/metal oxide composites is superior in the low energy range.
© Società Italiana di Fisica (SIF) and Springer-Verlag GmbH Germany, part of Springer Nature, 2020